Two sentences about sentence variety

Sentences vary in many ways e.g. in being short or long. 

What matters is that you draw on the many types—brewing single-clause propositions with multi-clause compound-complex sentences, mingling the declaratives with questions, imperatives and exclamatives, and blending periodic sentences with strung-along clauses—avoiding at once the monotonous thuds of successive short sentences and the muddiness of excessively long, adverbially qualified statements, (which, as Verlyn Klinkenborg says lack the power of implication, “the ability to suggest more than the words seem to allow, the ability to speak to the reader in silence”), hoping to get the attention of the work-stressed and time-constrained reader/examiner who is browned off by the drudgery of assessment and tempted to hastily make up her mind about the essay grade sooner than your essay deserves, even as you have worked your tail off to keep the reader stimulated by peppering your prose with periodic sentences built with prepositional phrases, brought forward (for a dash of variety) to the front of the sentence, thus adding to the myriads of ways in which different types of sentences can be juggled in a single piece, and create the effects of suspense, emphasis, subordination and so forth: in the evocative words of Gertrude Stein, “like a cinema picture made up of succession and each moment having its own emphasis that is its own difference”.